The Numerical Simulation Of Wave Propagation On The Reefs Terrain By The Numerical Model Based On Boussinesq Equations

In recent years, there have been a lot of offshore structures which are built on coral reef flat at home and abroad. Scholars increasingly concerned about the propagation characteristics of the waves on the reefs terrain. Boussinesq equation is suitable to study the process of wave propagation in shallow water due to its nonlinear and dispersive feature. To explore the wave propagation characteristics on inshore reefs terrain, this paper adopts FUNWAVE-1D and FUNWAVE-TVD model based on Boussinesq equations to simulate the process of the wave propagation on the 2D reef terrain.Wave breaking is one of the main properties for the wave propagation on the reefs terrain. To explore the wave propagation characteristics on inshore reefs terrain, this paper proposed an improvement for the eddy viscosity model to make improvements introduction of slope change. Results of numerical calculation and physical modelling experiment are compared for wave surface along the evolution, wave heights along the distribution and spectrum changes. It proves that the improved breaking term in the simulation of wave propagation on the reefs terrain is better. The improved model can accurately reflect the wave nonlinear, wave breaking and stable wave high on reef after breaking particularly. Besides, the parameters associated with the wave breaking simulation in the numerical model FUNWAVE-TVD are analyzed and proposed. The research results provide a reference for the simulation of wave breaking in engineering practices.